Change pin design

问题:

Is it possible to change the MKAnnotation pin to a png of my own design?

回答1:

override this and be a delegate of MKMapViewDelegate to implement override the method.

- (MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation;

Create an annotation,

MKAnnotationView *annotationView = (MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];// get a dequeued view for the annotation like a tableview

if (annotationView == nil)
    {
        annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease]; 
    }
    annotationView.annotation = annotation;
    annotationView.canShowCallout = YES; // show the grey popup with location etc
    UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    ///[rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];
    annotationView.rightCalloutAccessoryView = rightButton;

    annoationView.image = [UIImage imageNamed:@"random.png"];

Custom image done

回答2:

Yes, in the viewForAnnotation delegate callback you can provide whatever view you like.

回答3:

For custom annotation image, set the image property, as such.

UIImage *annImage = [UIImage imageNamed:@"AnnotationIcon.png"];
annView.image = annImage;

Do note that the MKPinAnnotationView animateDrop property will not work on custom images. There's a way to duplicate that animation though. See How do I animate MKAnnotationView drop?